The United Nations Procurement Division (UNPD) is expected to launch a solicitation for the provision of a Global Systems Contract for heating ventilation and air conditioning systems (HVAC) in the near future. United Nations Peace Operations and other UN Entities operate in some of the warmest countries in the world. It is estimated that roughly half of the energy consumption of UN field offices is due to the operation of HVAC units. The long operational hours of the units and harsh working conditions, causes a high yearly turnover of these units (~10,000 replaced every year), with related waste handling burden. In order to reduce energy costs and the environmental impact of the UN, the United Nation Procurement Division, wishes to assess the market for novel HVAC solutions, which have higher energy efficiency performance, reduced environmental footprint and integrated features which can limit the operation and increase the lifetime. Moreover, to support waste management endeavours within the UN field offices and potentially reduce total cost of ownership of equipment, it is desirable to assess the availability of take-back services including responsible and verifiable methods for the recycling and or disposal paying particular attention to refrigerant gases. Collection could be achieved through reverse logistics or some other preferred and suitable arrangement by the contractor that provided these HVAC units. In this context, the UN would like to receive responses to this RFI from Vendors by email to the email address mentioned above by the closing date of 05 April 2021. The responses to the questions must be sent together with the Vendor Response Form on page four (4) of this RFI by email to the e-mail address mentioned above.